A nurse in an emergency department is reviewing a client's ECG reading.
Which of the following findings should the nurse identify as an indication that the client has first-degree heart block?
Prolonged PR intervals.
Nondiscernible P waves.
More P waves than QRS complexes.
No correlation between P and QRS waves.
The Correct Answer is A
First-degree heart block is a type of atrioventricular (AV) block that involves the consistent prolongation of the PR interval (defined as >0.20 seconds) due to delayed conduction via the atrioventricular node.
This is seen on an ECG as a PR interval greater than 200 ms in length.
Choice B: Nondiscernible P waves are not an answer because it is not mentioned as a characteristic of first-degree heart block in my sources.
Choice C: More P waves than QRS complexes is not an answer because it is not mentioned as a characteristic of first-degree heart block in my sources.
Choice D: No correlation between P and QRS waves is not an answer because it is not mentioned as a characteristic of first-degree heart block in my sources.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A decrease in the Glasgow Coma Scale (GCS) score indicates a decline in the client’s level of consciousness and neurological function.
This can be a sign of increased intracranial pressure or other complications related to the skull fracture.
Choice B is incorrect because an increase in WBC count may indicate an infection, but it is not as concerning as a decrease in GCS score.
Choice C is incorrect because a change in pulse pressure may indicate changes in cardiovascular function, but it is not as concerning as a decrease in GCS score.
Choice D is incorrect because a change in pupil diameter may indicate changes in neurological function, but it is not as concerning as a decrease in GCS score.
Correct Answer is B
Explanation
Pitting edema is a common and obvious symptom of right-sided heart failure.
This occurs when fluid retention causes swelling in the lower limbs and sometimes the abdomen.
Choice A is incorrect because poor skin turgor is not a common symptom of right-sided heart failure.
Choice C is incorrect because oliguria, or decreased urine output, is not a common symptom of right-sided heart failure.
Choice D is incorrect because S4 galloping heart sounds are not a common symptom of right-sided heart failure.
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